Samuel Michael Field, 40, violently beat 93-year-old Martin Glynn for more than 10 hours in Desborough in September 2024 - Mr Glynn died three months after the attack12:25, 29 May 2026Updated 12:32, 29 May 2026A 40-year-old man has been jailed for life after killing his 93-year-old best friend by torturing him for more than 10 hours.‌Samuel Michael Field launched a prolonged attack on Martin Glynn inside his flat in Desborough in September 2024, believing his friend of 20 years had somehow betrayed him. Mr Glynn suffered multiple bleeds on the brain and a fractured neck, and sadly died three months later as a result of his injuries.‌At Northampton Crown Court on Friday, Field was jailed for life with a minimum term of 22 years. Following an 11-day trial at the same court, the jury of seven men and five women found Field guilty of murdering Mr Glynn on May 6.‌On September 19, 2024, Mr Glynn travelled by bus from his home in Kings Heath, Northampton, to Field’s flat in Gold Street, Desborough. It was a two-hour journey he made at least once a week to visit his friend.However on this occasion when Mr Glynn arrived, Field was less than welcoming, falsely believing his best friend had betrayed him to an unknown "Irishman", the court heard.‌Field’s mental health had declined in the preceding months and, with his paranoia heightened, he became violent when he did not get the confession he wanted from Mr Glynn, the court was told.After punching, kicking and stomping on the victim's head, Field strangled him, fracturing a bone in his neck and leaving him with severe bruising and swelling to his face and body.Footage from a hidden camera inside the flat showed Field carrying on as though nothing had happened while Mr Glynn’s feet could be seen as he lay motionless on the floor.‌Late on September 20, more than 24 hours after the assault, Field called East Midlands Ambulance Service several times and provided a full confession, prompting the call handler to alert Northamptonshire Police.Field waited outside the flat for officers to arrive and, when arrested, told them he had "assaulted someone" and "I know what I have done". Despite being told that he was under caution, Field continued to tell them what had happened.Inside the flat, officers found Mr Glynn in the bathroom. He appeared confused as to how he had sustained the serious facial injuries. He was taken to Northampton General Hospital, where he was diagnosed with multiple bleeds on the brain and a fractured neck.‌Field was charged with Section 18 grievous bodily harm with intent and was remanded into custody by Northampton Magistrates’ Court on September 23 before the case was committed to the crown court for trial. Sadly, Mr Glynn never recovered from the injuries he sustained in the attack and died on December 26.On August 26 last year, during an appearance at Northampton Crown Court, Field was charged with Mr Glynn’s murder and further remanded into custody to await trial.During the trial, Field chose to represent himself and dismissed his defence counsel before deciding not to provide a defence. This gave the jury no other option but to find him guilty of murdering Mr Glynn.‌Speaking after the conviction, Detective Sergeant Megan Scotney said: "Samuel Field described Mr Glynn as his best friend of almost two decades."However, instead of looking out for Mr Glynn, Field exploited their friendship and tortured the 93-year-old over 10-hours, inflicting the most horrific injuries on a vulnerable man, which ultimately cost him his life."Mr Glynn lived independently and through his loyalty to Field, travelled more than two hours from his home in Northampton to Desborough at least once, sometimes twice a week to visit him.Article continues below"Only Field knows why he attacked Mr Glynn that day, but I am pleased the jury has seen him for what he truly is - a dangerous, violent man."Nothing can bring Mr Glynn back, but I very much hope this guilty verdict offers his loved ones some comfort. Our thoughts remain with them all in their grief."